Deuteronomy 7:12-13, 15

“Then it shall come about, because you listen to these judgments and keep and do them, that the LORD your God will keep with you the covenant and the [steadfast] lovingkindness which He swore to your fathers. He will love you and bless you and multiply you; He will also bless the fruit of your womb and the fruit of your land, your grain and your new wine and your [olive] oil, the offspring of your cattle and the young of your flock, in the land which He swore to your fathers to give you.

The LORD will take away from you all sickness; and He will not subject you to any of the harmful diseases of Egypt which you have known, but He will impose them on all [those] who hate you.